stroketool.h

/*
 
Pencil2D - Traditional Animation Software
Copyright (C) 2005-2007 Patrick Corrieri & Pascal Naidon
Copyright (C) 2012-2020 Matthew Chiawen Chang
 
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; version 2 of the License.
 
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.
 
*/
 
#ifndef STROKETOOL_H
#define STROKETOOL_H
 
#include "basetool.h"
#include "pointerevent.h"
#include "preferencesdef.h"
#include "strokeinterpolator.h"
#include "undoredomanager.h"
 
#include "canvascursorpainter.h"
#include "radialoffsettool.h"
 
#include <QList>
#include <QPointF>
 
 
class StrokeTool : public BaseTool
{
    Q_OBJECT
 
public:
    explicit StrokeTool(QObject* parent);
    ~StrokeTool();
 
    virtual const StrokeToolProperties& strokeToolProperties() const = 0;
 
    void startStroke(PointerEvent::InputType inputType);
    void drawStroke();
    void endStroke();
 
    bool leavingThisTool() override;
    bool enteringThisTool() override;
 
    void updateCanvasCursor();
 
    void loadSettings() override;
    bool isActive() const override { return mInterpolator.isActive(); }
 
    bool keyPressEvent(QKeyEvent* event) override;
    void pointerPressEvent(PointerEvent* event) override;
    void pointerMoveEvent(PointerEvent* event) override;
    void pointerReleaseEvent(PointerEvent* event) override;
    bool enterEvent(QEnterEvent*) override;
    bool leaveEvent(QEvent*) override;
 
    bool handleQuickSizing(PointerEvent* event);
 
    void paint(QPainter& painter, const QRect& blitRect) override;
 
    virtual void setStablizationLevel(int level);
    virtual void setWidth(qreal width);
    virtual void setFeather(qreal feather);
    virtual void setPressureEnabled(bool enabled);
    virtual void setFeatherEnabled(bool enabled);
    virtual void setAntiAliasingEnabled(bool enabled);
    virtual void setFillContourEnabled(bool enabled);
    virtual void setStrokeInvisibleEnabled(bool enabled);
 
signals:
    void widthChanged(qreal value);
    void featherChanged(qreal value);
    void pressureEnabledChanged(bool enabled);
    void featherEnabledChanged(bool enabled);
    void antiAliasingEnabledChanged(bool enabled);
    void fillContourEnabledChanged(bool enabled);
    void invisibleStrokeEnabledChanged(bool enabled);
    void stabilizationLevelChanged(int level);
 
public slots:
    void onPreferenceChanged(SETTING setting);
    void onViewUpdated();
 
protected:
    QPointF getCurrentPressPixel() const;
    QPointF getCurrentPressPoint() const;
    QPointF getCurrentPixel() const;
    QPointF getCurrentPoint() const;
    QPointF getLastPixel() const;
    QPointF getLastPoint() const;
 
    QRectF cursorRect(StrokeToolProperties::Type settingType, const QPointF& point);
 
    static bool mQuickSizingEnabled;
 
    QHash<Qt::KeyboardModifiers, int> mQuickSizingProperties;
    bool mFirstDraw = false;
 
    QList<QPointF> mStrokePoints;
    QList<qreal> mStrokePressures;
 
    qreal mCurrentWidth    = 0.0;
    qreal mCurrentPressure = 0.5;
 
    PointerEvent::InputType mCurrentInputType = PointerEvent::Unknown;
 
    virtual bool emptyFrameActionEnabled();
 
    bool mCanvasCursorEnabled = false;
    QPointF mLastPixel { 0, 0 };
 
    StrokeInterpolator mInterpolator;
 
    const UndoSaveState* mUndoSaveState = nullptr;
 
    static const qreal FEATHER_MIN;
    static const qreal FEATHER_MAX;
    static const qreal WIDTH_MIN;
    static const qreal WIDTH_MAX;
 
private:
    CanvasCursorPainter mWidthCursorPainter;
    CanvasCursorPainter mFeatherCursorPainter;
 
    RadialOffsetTool mWidthSizingTool;
    RadialOffsetTool mFeatherSizingTool;
};
 
#endif // STROKETOOL_H